MwSt Rechner is a free Android app developed by Intermedia Werbeagentur. The app falls under the Utilities & Tools category and is a simple tax calculator that helps users calculate the value-added tax (VAT) in Germany. The app is no longer updated and has been replaced by the improved version, "MwSt Steuer 2020," which is now available on the Google Play Store.

The MwSt Rechner app has a straightforward interface that is easy to use. It allows users to enter the net amount and the VAT rate, and then calculates the gross amount. The app also provides the user with the option to switch between 19% and 7% VAT rates, which is handy for those who need to calculate both rates. Overall, the app is a useful tool for those who need to calculate VAT and don't want to do it manually.